Note: The current Fujita Scale will be retired in February, 2007 in favor of an enhanced Fujita Scale system. More information about the Enhanced F-Scale can be found at this Storm Prediction Center web page.

Note: F-scale winds should not be taken literally. The precise wind speeds used in the scale are estimates only and have never been scientifically verified. Different wind speeds may cause similar-looking damage from place to place and even building to building. A thorough engineering analysis would be needed to verify actual wind speeds.